Acta Neurochirurgica

, Volume 160, Issue 3, pp 551–557 | Cite as

Procedural complications of endovascular treatment in patients with aneurysmal subarachnoid haemorrhage treated at a single centre

  • Mikko Alanen
  • Liisa Pyysalo
  • Iiro Jalava
  • Oona Snicker
  • Juha-Pekka Pienimäki
  • Juha Öhman
  • Antti Ronkainen
Original Article - Vascular



We present a single-centre experience of procedural complications suffered by patients undergoing endovascular treatment for a ruptured saccular intracranial aneurysm at Tampere University Hospital, Finland, between 2000 and 2014.


From 2000 to 2014, we treated 1,253 patients with aneurysmal subarachnoid haemorrhage, 491 of whom received endovascular treatment. Clinical data were collected retrospectively from the hospital’s aneurysm database. A procedural complication was defined as having occurred whenever there was a documented new event in the patient’s medical records or a note of a technical complication written by an interventionist after endovascular treatment. Procedural complications could be with or without clinical symptoms.


Nearly 40% (491/1253) of the patients were treated with the endovascular method. Procedural complications occurred in 11.4% (56/491) of cases. The morbidity rate was 4.5% (22/491) and the mortality rate was 0.2% (1/491). Of the 56 complications, ischaemic complications occurred in 52% (29/56), haemorrhagic complications occurred in 27% (15/56) and technical complications occurred in 21% (12/56) of cases. In 61% (34/56) of the cases, the procedural complication did not cause any clinical symptoms.


The total risk for procedural complications leading to postoperative disability or death at our institute was 4.7%. The complication frequency is in accordance with previous reports. Endovascular treatment of ruptured intracranial aneurysms is a safe treatment method when patient selection is carefully performed.


Subarachnoid haemorrhage Intracranial aneurysm Endovascular treatment Procedural complications Treatment Aneurysm 



We would like to thank Anne Simi, the study nurse, for her support in collecting the data. We would also like to thank Data Scientist Jarkko Penttinen for mastering the database.


No funding was received for this research.

Compliance with ethical standards

Conflict of interest

All authors certify that they have no affiliations with or involvement in any organisation or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements) or non-financial interest (such as personal or professional relationships, affiliations, knowledge, or beliefs) in the subject matter or materials discussed in this manuscript.

Ethical approval

No formal authorisation is needed from an ethics committee for this type of study.

Informed consent

This type of study does not require formal consent.


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Tampere University HospitalTampereFinland

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